We show that direct feedback based on quantum jump detection can be used to generate entangled steady states. We present a strategy that is insensitive to detection inefficiencies and robust against errors in the control Hamiltonian. This feedback procedure is also shown to overcome spontaneous emission effects by stabilising states with high degree of entanglement.
@article{arxiv.0705.3492,
title = {Stabilising entanglement by quantum jump-based feedback},
author = {A. R. R. Carvalho and J. J. Hope},
journal= {arXiv preprint arXiv:0705.3492},
year = {2009}
}